IPA: /ˈaʊtˌlaɪnər/
KK: /aʊtˈlaɪnər/
A tool or software used to arrange information or text in a structured way, often in a hierarchical format.
She used an outliner to organize her ideas for the presentation.
Outliner → It is formed from "out-" (meaning external or outside) and "line" (from Old French *ligne*, meaning a straight mark or stroke). The word "outliner" refers to someone who creates an outline, typically marking the external structure or main points of a subject.
Think of someone marking the main points or structure from the 'outside' — 'out-' means external, and 'line' refers to a straight mark.